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R30075 Cobalt vs. C83400 Brass

R30075 cobalt belongs to the cobalt alloys classification, while C83400 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is C83400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
110
Elongation at Break, % 12
30
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 82 to 98
42
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
240
Tensile Strength: Yield (Proof), MPa 480 to 840
69

Thermal Properties

Latent Heat of Fusion, J/g 320
200
Melting Completion (Liquidus), °C 1360
1040
Melting Onset (Solidus), °C 1290
1020
Specific Heat Capacity, J/kg-K 450
380
Thermal Conductivity, W/m-K 13
190
Thermal Expansion, µm/m-K 12
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
44
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
46

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
43
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
55
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
21
Stiffness to Weight: Axial, points 14 to 17
7.2
Stiffness to Weight: Bending, points 24 to 25
19
Strength to Weight: Axial, points 26 to 42
7.7
Strength to Weight: Bending, points 22 to 31
9.9
Thermal Diffusivity, mm2/s 3.5
57
Thermal Shock Resistance, points 21 to 29
8.4

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
88 to 92
Iron (Fe), % 0 to 0.75
0 to 0.25
Lead (Pb), % 0
0 to 0.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0 to 1.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0 to 0.010
0 to 0.080
Tin (Sn), % 0
0 to 0.2
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
8.0 to 12
Residuals, % 0
0 to 0.7